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张亚飞,安新正,牛薇,张冰.基于检测方法的再生混凝土弹性模量试验研究[J].河北工程大学自然版,2019,36(1):41-45
基于检测方法的再生混凝土弹性模量试验研究
Experimental Study on Elastic Modulus of Recycled Concrete Based on Detection Method
投稿时间:2018-09-27  
DOI:10.3969/j.issn.1673-9469.2019.01.009
中文关键词:  再生细集料取代率  富含砖粒再生混凝土  应力-应变曲线  弹性模量  超声波
英文关键词:recycled fine aggregate replacement rate  rich in brick recycled concrete  stress-strain curve  elastic modulus  ultrasonic wave
基金项目:河北省自然科学基金资助项目(E2015204111);河北省科学技术研究与发展计划资助项目(152736090)
作者单位
张亚飞 河北工程大学 土木工程学院, 河北 邯郸 056038 
安新正 河北工程大学 土木工程学院, 河北 邯郸 056038 
牛薇 河北工程大学 土木工程学院, 河北 邯郸 056038 
张冰 河北工程大学 土木工程学院, 河北 邯郸 056038 
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中文摘要:
      利用废弃混凝土加工制备为再生细集料,以再生细集料取代率为变量参数配置3种水胶比的再生骨料混凝土,通过混凝土标准弹性模量测试法、基于本构关系测试法以及超声波无损检测法,研究再生细集料取代率对富含砖粒再生混凝土弹性模量的影响规律以及超声波波速与弹性模量之间关系。试验结果表明,以应力-应变曲线上升段的割线斜率作为再生混凝土弹性模量值,该值随再生细集料取代率的变化规律与弹性模量试验测得的变化规律一致,呈现先增大后减小的趋势,且在取代率为30%时达到最佳状态。提出了以再生细骨料取代率为影响因素,富含砖粒再生混凝土立方体抗压强度与弹性模量关系计算模型,拟合出了超声波波速与再生混凝土弹性模量函数式。
英文摘要:
      Recycled aggregate concrete is prepared by using waste concrete processing as regenerated fine aggregate, and three kinds of water-to-binder ratio are arranged with variable rate of regeneration fine aggregate replacement. The influence of aggregate replacement rate on the elastic modulus of brickrich recycled concrete and the relationship between ultrasonic wave velocity and elastic modulus are investigated through concrete standard elastic modulus test method, constitutive relationship test method and ultrasonic non-destructive testing. The results show the slope of the secant of the rising section of the stress-strain curve is the same as the variation of the elastic modulus of the recycled concrete with the change rate of the regenerated fine aggregate, which is consistent with the change of the elastic modulus test. When the replacement rate is 30%, the best condition is achieved. The calculation model of the relationship between compressive strength and elastic modulus of brick-recycled concrete cubes is proposed by taking the replacement rate of recycled fine aggregates as the influencing factors, and the ultrasonic wave velocity and the elastic modulus of recycled concrete are fitted.
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